| // Copyright 2016 the V8 project authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| // Flags: --opt --allow-natives-syntax --no-always-opt |
| |
| function f(b) { |
| if (b == 1) { |
| let a = a = 20; |
| } |
| } |
| |
| f(0); |
| assertThrows(() => {f(1)}, ReferenceError); |
| |
| %PrepareFunctionForOptimization(f); |
| f(0); |
| f(0); |
| %OptimizeFunctionOnNextCall(f); |
| f(0); |
| assertOptimized(f); |
| // Check that hole checks are handled correctly in optimized code. |
| assertThrows(() => {f(1)}, ReferenceError); |
| assertOptimized(f); |
